Christmas morning should be about opening presents and spending time together—not standing over the stove making breakfast. This Easy Slow Cooker Christmas Breakfast Casserole for Kids combines crispy-edged hash browns, mild breakfast sausage, fluffy eggs, melted cheddar, and finely diced red and green peppers in one cozy breakfast that practically cooks itself.

The flavors are intentionally familiar and mild enough for kids, while the red and green peppers add just enough Christmas color without turning breakfast into a gimmick. Prepare the ingredients ahead, layer everything in the slow cooker, and you’ll have a warm, cheesy breakfast ready for a busy holiday morning.

Even better, this casserole feeds about eight people and doesn’t require you to cook individual eggs, pancakes, or breakfast sandwiches while everyone else is enjoying Christmas morning.

Easy Slow Cooker Christmas Breakfast Casserole

This recipe takes the familiar combination of sausage, eggs, potatoes, and cheese and moves it from the oven to the slow cooker.

That distinction matters on Christmas morning.

Your oven stays available for other holiday cooking, and you don’t need to constantly watch a skillet. The slow cooker gently sets the egg mixture while the cheese melts between layers of seasoned sausage and potatoes.

It’s also intentionally different from my Hearty Breakfast Bake with Sausage and Hashbrowns, which is baked in a 9×13-inch pan and develops a different texture. This version is specifically designed for the convenience of slow cooking.

The vegetables are finely diced so you get small pops of red and green without large pieces that can sometimes make a kid-friendly breakfast harder to sell.

Why You’ll Love This Christmas Breakfast Casserole

🎄 Made for Christmas Morning

The red and green peppers add natural Christmas colors while the warm sausage, eggs, potatoes, and cheese make it feel like a special holiday breakfast.

🥚 Familiar Kid-Friendly Flavors

Eggs, sausage, hash browns, and cheddar are the stars here.

There are no hot peppers or spicy sauces.

🫕 The Slow Cooker Does the Work

Once everything is layered, the slow cooker handles most of the cooking.

👨‍👩‍👧‍👦 Feeds the Family

One batch makes approximately eight hearty servings.

🧀 Cheesy and Comforting

Cheddar is layered throughout rather than simply sprinkled over the top.

🥔 Hearty Enough for Christmas Morning

Potatoes and sausage make this much more substantial than a simple egg dish.

🕒 Prep-Ahead Friendly

Several components can be prepared in advance, making Christmas morning easier.

Ingredients You’ll Need

Frozen Shredded Hash Browns

Use 30 ounces frozen shredded hash browns, thawed.

Thawing is important because frozen potatoes can release additional water as they cook, potentially making the casserole watery.

After thawing, pat away obvious excess moisture with paper towels or a clean kitchen towel.

Mild Breakfast Sausage

You’ll need 1 pound mild breakfast sausage.

Use a sausage your family already enjoys.

Because we’re keeping the casserole kid-friendly, mild sausage works better than a spicy variety.

Cook it completely in a skillet and drain excess grease before adding it to the slow cooker.

Eggs

Use 12 large eggs.

They create the base that binds the potatoes, sausage, vegetables, and cheese together.

Whole Milk

Use 1 cup whole milk.

Milk loosens the eggs enough to create a tender casserole rather than an overly dense one.

Sharp Cheddar Cheese

You’ll need 2½ cups shredded cheddar cheese, divided.

Sharp cheddar provides plenty of flavor without needing complicated seasonings.

If your children prefer a milder cheese, medium cheddar works too.

Red Bell Pepper

Use ½ small red bell pepper, finely diced.

This provides natural red Christmas color and a little sweetness.

Green Bell Pepper

Use ½ small green bell pepper, finely diced.

Combined with the red pepper, it creates a subtle Christmas appearance.

Dice both peppers relatively small.

Yellow Onion

Use ½ small yellow onion, finely diced.

The onion adds savory flavor without dominating the eggs.

If you’re cooking for children who strongly dislike onion, reduce the amount to ¼ onion or chop it extremely finely.

Garlic

Use 1 small garlic clove, minced.

We’re intentionally keeping the garlic restrained.

Butter

Use 1 tablespoon unsalted butter for greasing the slow cooker.

This helps prevent sticking around the edges.

Smoked Paprika

Use ½ teaspoon smoked paprika.

It gives the casserole a little warmth without making it spicy.

Regular sweet paprika can be substituted.

Garlic Powder

Use ½ teaspoon garlic powder for gentle savory flavor throughout the egg mixture.

Black Pepper

Use ¼ teaspoon freshly ground black pepper.

You can reduce this further for very young or pepper-sensitive eaters.

Salt

Use approximately ½ teaspoon fine salt, adjusting depending on how salty your sausage and cheese are.

How to Make Slow Cooker Christmas Breakfast Casserole

1. Thaw the Hash Browns

Thaw the shredded hash browns completely.

If they feel particularly wet, spread them over a clean kitchen towel or several layers of paper towels and gently press away excess moisture.

Don’t squeeze them into a completely dry mass—you simply want to remove obvious surface moisture.

2. Brown the Sausage

Place the breakfast sausage in a large skillet over medium heat.

Break it into small crumbles as it cooks.

Cook until no pink remains.

3. Drain the Sausage

Transfer the cooked sausage to a paper-towel-lined plate or drain away the excess grease.

This step helps prevent a greasy casserole.

4. Soften the Vegetables

Leave approximately a teaspoon of sausage drippings in the skillet.

Add the finely diced onion and red and green bell peppers.

Cook for approximately 3–4 minutes, just until they begin to soften.

5. Add the Garlic

Add the minced garlic and cook for approximately 30 seconds.

Remove the skillet from the heat.

We aren’t trying to deeply brown the vegetables. They only need a head start before going into the slow cooker.

6. Prepare the Slow Cooker

Generously grease the inside of a 6-quart slow cooker with the softened butter.

Pay particular attention to the sides and corners where the eggs can stick.

7. Season the Potatoes

Place the thawed hash browns in a large bowl.

Add the smoked paprika, garlic powder, black pepper, and approximately half the salt.

Toss gently until evenly distributed.

8. Start the First Layer

Spread approximately one-third of the hash browns across the bottom of the greased slow cooker.

Don’t aggressively compact them.

9. Add Sausage

Scatter approximately one-third of the cooked sausage over the potatoes.

10. Add the Christmas Vegetables

Scatter approximately one-third of the cooked red pepper, green pepper, and onion mixture over the sausage.

The red and green pieces should be visible but not overwhelming.

11. Add Cheese

Sprinkle approximately ½ cup shredded cheddar over the first layer.

12. Repeat the Layers

Repeat with another layer of hash browns, sausage, vegetables, and cheese.

Then make the final layer with the remaining potatoes, sausage, and vegetables.

Reserve approximately 1 cup cheese for the top.

13. Make the Egg Mixture

Crack the eggs into a large mixing bowl.

Add the milk and remaining salt.

Whisk until the yolks and whites are completely combined.

You don’t need to whip lots of air into the eggs.

14. Pour the Eggs into the Slow Cooker

Slowly pour the egg mixture evenly over the layered ingredients.

Pour around different areas rather than dumping everything into the center.

The egg mixture should work its way between the potatoes and sausage.

15. Add the Remaining Cheese

Sprinkle the reserved cheddar evenly over the top.

Again, don’t worry about making it perfectly symmetrical.

16. Cook

Cover the slow cooker.

Cook on LOW for approximately 4½–5½ hours, or until the center is set and the egg mixture reaches 160°F (71°C). USDA guidance recommends cooking egg dishes to 160°F.

Slow cookers vary considerably, so begin checking toward the earlier end rather than relying solely on the clock.

17. Check the Center

Insert an instant-read thermometer into the center.

The casserole should be fully set rather than liquid or visibly wet.

Avoid repeatedly removing the lid during cooking because that releases heat.

18. Let It Rest

Once cooked, turn off the slow cooker and remove the lid.

Allow the casserole to rest for approximately 10 minutes.

This helps the egg mixture settle and makes serving easier.

19. Serve

Cut or scoop the casserole into approximately eight portions.

For adults, you can offer hot sauce, salsa, sliced green onions, or additional black pepper at the table rather than putting stronger flavors directly into the kid-friendly casserole.

Equipment

You’ll need a 6-quart slow cooker, large skillet, mixing bowls, whisk, silicone spatula or wooden spoon, measuring cups and spoons, cheese grater if shredding your own cheese, and an instant-read food thermometer.

Variations

Ham and Cheese Christmas Casserole

Replace the breakfast sausage with approximately 2 cups diced cooked ham.

This is also a useful option if you have leftover holiday ham.

Bacon Christmas Breakfast Casserole

Replace some or all of the sausage with cooked crumbled bacon.

Cook the bacon first and drain it well.

Extra-Cheesy Version

Add another ½ cup shredded cheddar or combine cheddar with Monterey Jack.

No-Pepper Version

If your kids refuse bell peppers, simply leave them out.

You lose the red-and-green Christmas effect, but the casserole still works.

Vegetarian Version

Leave out the sausage and increase the vegetables.

Mushrooms can work well, but sauté them thoroughly first so they don’t release excessive moisture into the casserole.

Less Onion

Reduce the onion to ¼ small onion and mince it very finely.

Different Cheese

Try Colby Jack, Monterey Jack, or a mild cheddar.

Pro Tips

Thaw the hash browns first. Adding them frozen introduces unnecessary moisture.

Drain your sausage. Excess grease can collect at the bottom of a slow-cooker casserole.

Pre-cook the vegetables. This improves both their texture and flavor.

Dice vegetables finely for kids. Smaller pieces blend into the casserole much more naturally.

Grease the slow cooker thoroughly. Egg dishes can stick aggressively around the edges.

Don’t over-whisk the eggs. You’re combining them, not making a soufflé.

Don’t repeatedly lift the lid. Slow cookers lose heat whenever the lid is removed.

Start checking early. Different slow cookers can cook egg casseroles at noticeably different rates.

Use temperature as the final test. The center should reach 160°F rather than relying only on appearance.

Let it rest. Ten minutes makes serving much cleaner.

Christmas Morning Prep Strategy

There are a couple of safe ways to reduce your workload on Christmas morning.

The night before, you can cook the sausage and vegetables, allow them to cool, then refrigerate them promptly in covered containers. You can also shred the cheese and thaw the hash browns in the refrigerator.

In the morning, grease the slow cooker, assemble the casserole, whisk the egg mixture, and begin cooking.

I prefer this approach over leaving a room-temperature slow cooker filled with raw egg mixture overnight. Perishable foods should be kept refrigerated at 40°F (4°C) or below, according to USDA food-safety guidance.

If you want a breakfast that is intentionally assembled the night before and baked the following morning, your Overnight French Toast Casserole is the better Yummizer option.

How to Store Leftovers

Allow leftovers to cool briefly, then transfer them to shallow airtight containers and refrigerate promptly.

USDA guidance recommends refrigerating perishable leftovers within 2 hours and using most cooked leftovers within 3–4 days.

How to Reheat

Individual servings are easiest to reheat in the microwave.

Cover loosely and heat until hot throughout.

For multiple portions, place them in an oven-safe dish, cover loosely with foil, and warm at 325°F until heated through.

USDA recommends reheating leftovers to 165°F (74°C).

Can You Freeze Christmas Breakfast Casserole?

Yes.

Let the cooked casserole cool and divide it into individual portions.

Wrap or package the portions well and freeze.

Thaw overnight in the refrigerator before reheating.

Individual portions are particularly convenient because you don’t have to thaw the entire casserole for one breakfast.

Frequently Asked Questions

Can I Put Frozen Hash Browns Directly in the Slow Cooker?

I recommend thawing them first.

Frozen potatoes can release extra moisture and may also affect how quickly the casserole heats.

Is This Breakfast Casserole Spicy?

No.

The recipe uses mild sausage and bell peppers rather than hot peppers.

Smoked paprika provides flavor rather than significant heat.

Can I Leave Out the Bell Peppers?

Absolutely.

They’re included primarily for flavor, sweetness, and natural red-and-green Christmas color.

Can I Make This Without Sausage?

Yes.

You can leave it out or substitute cooked ham, bacon, or sautéed vegetables.

What Size Slow Cooker Do I Need?

A 6-quart slow cooker is ideal for this recipe.

How Do I Know When It’s Done?

The center should be set rather than wet, and an instant-read thermometer inserted into the middle should register 160°F (71°C).

Why Is My Casserole Watery?

Common causes include frozen or overly wet hash browns, vegetables that weren’t pre-cooked, or particularly greasy sausage.

Why Are the Edges Browning Faster?

Slow cookers heat primarily around the sides, so the outer portion naturally cooks faster than the center.

That’s another reason to stop cooking once the center is safely set rather than continuing unnecessarily.

Can I Double the Recipe?

I wouldn’t double this recipe in the same 6-quart slow cooker.

An overly deep casserole can take much longer for the center to cook safely and evenly.

For a larger gathering, use two slow cookers.

Can Kids Help Make It?

Children can help with age-appropriate cold-preparation jobs such as sprinkling cheese or adding measured ingredients under adult supervision.

Keep them away from the hot skillet and heated slow cooker.

What to Serve with Christmas Breakfast Casserole

Because this casserole is rich in eggs, cheese, potatoes, and sausage, fresh fruit is one of the easiest accompaniments.

A bowl of strawberries, blueberries, oranges, grapes, or melon adds freshness without creating another complicated recipe.

For adults, coffee is an obvious pairing, while milk or juice works well for children.

If you’re creating a larger Christmas brunch, add your Sheet Pan Pancakes (No-Flip Method). They’re much easier for a crowd than standing at the stove flipping individual pancakes.

Your Cheesy Egg Muffins (Meal Prep) are another convenient option when you need individual portions, while Cottage Cheese Pancakes provide a sweeter breakfast choice alongside the savory casserole.

For dessert later in the day, the new Peppermint Bark Cheesecake Bars and Easy Christmas Cake Pops with White Chocolate Drizzle continue the Christmas theme without repeating the breakfast flavors.

Nutrition

Nutrition will vary significantly depending on the breakfast sausage, hash browns, cheddar cheese, and milk you use.

For the most accurate Yummizer nutrition panel, calculate the values through WPRM using the exact products and quantities entered into the recipe rather than estimating them manually.